Sample hold circuit

Details Sample hold circuit Sample hold circuit

1995-07-10

1996-12-10

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 96, 327314, 327323, 327563, G11C 2702

Patent

active

055834590

ABSTRACT:
A sample hold circuit comprises a first transistor having its base connected to an input terminal and its collector connected to a voltage supply terminal, series-connected first and second diodes having a cathode of the first diode connected to an emitter of the first transistor, a first constant current source having its one end connected to an anode of the second diode circuit and its other end connected to the voltage supply terminal, a first differential circuit including a first branch connected to the emitter of the first transistor and a second branch connected to the anode of the second diode, a third diode having its cathode connected to the anode of the second diode, a second transistor having its base connected to a connection node between the second diode and the third diode and its collector connected to the voltage supply terminal, a second differential circuit including a first branch connected to the voltage supply terminal and a second branch connected to an emitter of the second transistor, a hold capacitor having its one end connected to the emitter of the second transistor, and a buffer having its input connected to the hold capacitor and its output connected to an output terminal and an anode of the third diode.

REFERENCES:
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patent: 4958094 (1990-09-01), Ishii et al.
patent: 5130572 (1992-07-01), Stitt et al.
Patent Abstracts of Japan, vol. 16, No. 113 (P-1327), 19 Mar. 1992, JP 3-283195.
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Patent Abstracts of Japan, vol. 13, No. 403 (P-929), 7 Sep. 1989, JP 1-144299.
Patent Abstracts of Japan, vol. 18, No. 353 (P-1764), 4 Jul. 1994, JP 6-089594.

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